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191<div class="main">
192
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]193<h1>Module constitute Methods</h1>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]194<p class="navigation-index">[<a href="#ConstituteImage">ConstituteImage</a> &bull; <a href="#PingImage">PingImage</a> &bull; <a href="#PingImages">PingImages</a> &bull; <a href="#ReadImage">ReadImage</a> &bull; <a href="#ReadImages">ReadImages</a> &bull; <a href="#WriteImage">WriteImage</a> &bull; <a href="#WriteImages">WriteImages</a>]</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]195
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]196<h2><a href="http://www.imagemagick.org/api/MagickCore/constitute_8c.html" id="ConstituteImage">ConstituteImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]197<div class="doc-section">
198
199<p>ConstituteImage() returns an image from the pixel data you supply. The pixel data must be in scanline order top-to-bottom. The data can be char, short int, int, float, or double. Float and double require the pixels to be normalized [0..1], otherwise [0..QuantumRange]. For example, to create a 640x480 image from unsigned red-green-blue character data, use:</p>
200
201<pre class="text">
202 image = ConstituteImage(640,480,"RGB",CharPixel,pixels,&exception);
203</pre>
204
205<p>The format of the ConstituteImage method is:</p>
206
207<pre class="code">
208 Image *ConstituteImage(const size_t columns,const size_t rows,
209 const char *map,const StorageType storage,const void *pixels,
210 ExceptionInfo *exception)
211</pre>
212
213<p>A description of each parameter follows:</p>
214
215<h5>columns</h5>
216<p>width in pixels of the image.</p>
217
218<h5>rows</h5>
219<p>height in pixels of the image.</p>
220
221<h5>map</h5>
222<p>This string reflects the expected ordering of the pixel array. It can be any combination or order of R = red, G = green, B = blue, A = alpha (0 is transparent), O = opacity (0 is opaque), C = cyan, Y = yellow, M = magenta, K = black, I = intensity (for grayscale), P = pad.</p>
223
224<h5>storage</h5>
225<p>Define the data type of the pixels. Float and double types are expected to be normalized [0..1] otherwise [0..QuantumRange]. Choose from these types: CharPixel, DoublePixel, FloatPixel, IntegerPixel, LongPixel, QuantumPixel, or ShortPixel.</p>
226
227<h5>pixels</h5>
228<p>This array of values contain the pixel components as defined by map and type. You must preallocate this array where the expected length varies depending on the values of width, height, map, and type.</p>
229
230<h5>exception</h5>
231<p>return any errors or warnings in this structure.</p>
232
233 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]234<h2><a href="http://www.imagemagick.org/api/MagickCore/constitute_8c.html" id="PingImage">PingImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]235<div class="doc-section">
236
237<p>PingImage() returns all the properties of an image or image sequence except for the pixels. It is much faster and consumes far less memory than ReadImage(). On failure, a NULL image is returned and exception describes the reason for the failure.</p>
238
239<p>The format of the PingImage method is:</p>
240
241<pre class="code">
242 Image *PingImage(const ImageInfo *image_info,ExceptionInfo *exception)
243</pre>
244
245<p>A description of each parameter follows:</p>
246
247<h5>image_info</h5>
248<p>Ping the image defined by the file or filename members of this structure.</p>
249
250<h5>exception</h5>
251<p>return any errors or warnings in this structure.</p>
252
253 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]254<h2><a href="http://www.imagemagick.org/api/MagickCore/constitute_8c.html" id="PingImages">PingImages</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]255<div class="doc-section">
256
257<p>PingImages() pings one or more images and returns them as an image list.</p>
258
259<p>The format of the PingImage method is:</p>
260
261<pre class="code">
262 Image *PingImages(const ImageInfo *image_info,ExceptionInfo *exception)
263</pre>
264
265<p>A description of each parameter follows:</p>
266
267<h5>image_info</h5>
268<p>the image info.</p>
269
270<h5>exception</h5>
271<p>return any errors or warnings in this structure.</p>
272
273 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]274<h2><a href="http://www.imagemagick.org/api/MagickCore/constitute_8c.html" id="ReadImage">ReadImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]275<div class="doc-section">
276
277<p>ReadImage() reads an image or image sequence from a file or file handle. The method returns a NULL if there is a memory shortage or if the image cannot be read. On failure, a NULL image is returned and exception describes the reason for the failure.</p>
278
279<p>The format of the ReadImage method is:</p>
280
281<pre class="code">
282 Image *ReadImage(const ImageInfo *image_info,ExceptionInfo *exception)
283</pre>
284
285<p>A description of each parameter follows:</p>
286
287<h5>image_info</h5>
288<p>Read the image defined by the file or filename members of this structure.</p>
289
290<h5>exception</h5>
291<p>return any errors or warnings in this structure.</p>
292
293 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]294<h2><a href="http://www.imagemagick.org/api/MagickCore/constitute_8c.html" id="ReadImages">ReadImages</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]295<div class="doc-section">
296
297<p>ReadImages() reads one or more images and returns them as an image list.</p>
298
299<p>The format of the ReadImage method is:</p>
300
301<pre class="code">
302 Image *ReadImages(const ImageInfo *image_info,ExceptionInfo *exception)
303</pre>
304
305<p>A description of each parameter follows:</p>
306
307<h5>image_info</h5>
308<p>the image info.</p>
309
310<h5>exception</h5>
311<p>return any errors or warnings in this structure.</p>
312
313 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]314<h2><a href="http://www.imagemagick.org/api/MagickCore/constitute_8c.html" id="WriteImage">WriteImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]315<div class="doc-section">
316
317<p>WriteImage() writes an image or an image sequence to a file or file handle. If writing to a file is on disk, the name is defined by the filename member of the image structure. WriteImage() returns MagickFalse is there is a memory shortage or if the image cannot be written. Check the exception member of image to determine the cause for any failure.</p>
318
319<p>The format of the WriteImage method is:</p>
320
321<pre class="code">
322 MagickBooleanType WriteImage(const ImageInfo *image_info,Image *image)
323</pre>
324
325<p>A description of each parameter follows:</p>
326
327<h5>image_info</h5>
328<p>the image info.</p>
329
330<h5>image</h5>
331<p>the image.</p>
332
333 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]334<h2><a href="http://www.imagemagick.org/api/MagickCore/constitute_8c.html" id="WriteImages">WriteImages</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]335<div class="doc-section">
336
337<p>WriteImages() writes an image sequence into one or more files. While WriteImage() can write an image sequence, it is limited to writing the sequence into a single file using a format which supports multiple frames. WriteImages(), however, does not have this limitation, instead it generates multiple output files if necessary (or when requested). When ImageInfo's adjoin flag is set to MagickFalse, the file name is expected to include a printf-style formatting string for the frame number (e.g. "image02d.png").</p>
338
339<p>The format of the WriteImages method is:</p>
340
341<pre class="code">
342 MagickBooleanType WriteImages(const ImageInfo *image_info,Image *images,
343 const char *filename,ExceptionInfo *exception)
344</pre>
345
346<p>A description of each parameter follows:</p>
347
348<h5>image_info</h5>
349<p>the image info.</p>
350
351<h5>images</h5>
352<p>the image list.</p>
353
354<h5>filename</h5>
355<p>the image filename.</p>
356
357<h5>exception</h5>
358<p>return any errors or warnings in this structure.</p>
359
360 </div>
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